9 个不同的数字找出相加为 100 的 7 个数字

        $numbres = [mt_rand(1, 3), mt_rand(4, 6), mt_rand(7, 9), mt_rand(10, 12), mt_rand(13, 15), mt_rand(16, 18), mt_rand(19, 21), mt_rand(22, 24), mt_rand(25, 27)];
        dump('原数据:');
        dump($numbres);
        dump('===================================================');
        foreach ($numbres as $key1 => $a1) {
            foreach ($numbres as $key2 => $a2) {
                if ($key2 == $key1) {
                    continue;
                }
                $new = $numbres;
                unset($new[$key1], $new[$key2]);
                $sum = array_sum($new);
                if ($sum == 100) {
                    dump($new);
                }

            }
        }